1503-1507The present study is concerned with one prosobranch gastropod species [Tornus subcarinatus (Montagu, 1803)], obtained during the benthic sampling by surveying at the upper-infralittoral zone (10-20 m.) of the Sinop Peninsula coasts between the years 2010 and 2011. A total of 155 species of marine Gastropoda (Mollusca) are known in the Black Sea coast of Turkey. However, the Prosobranch gastropod Tornus subcarinatus (Montagu, 1803) is recorded for the first time from the central Black Sea of Turkey. Previous records of the species were confined to the southern part of the Turkey, it is occurrence at Turkish coast of the Black Sea extends its distribution range to the Black Sea continued to Turkish coastal waters of Black Sea

Culha, Mehmet

Sezgin, Murat

English

NOPR

Indian Journal of Geo Marine Sciences Vol. 48 (10), October 2019, pp. 1503-1507       New record for the mollusca fauna of the black sea coast (sinop peninsula) of turkey: white belted shell, Tornus subcarinatus (Montagu, 1803), (Gastropoda, Tornidae) Mehmet Culha*1 & Murat Sezgin2 1*Department of Hydrobiology, Fisheries Faculty, Izmir Katip Celebi University, TR-35600 Cigli, İzmir, Turkey 2Department of Hydrobiology, Fisheries Faculty, Sinop University, TR-57000 Sinop, Turkey *[E-mail: msculha@gmail.com] Received 25 April 2018; revised 24 July 2018 The present study is concerned with one prosobranch gastropod species [Tornus subcarinatus (Montagu, 1803)], obtained during the benthic sampling by surveying at the upper-infralittoral zone (10-20 m.) of the Sinop Peninsula coasts between the years 2010 and 2011. A total of 155 species of marine Gastropoda (Mollusca) are known in the Black Sea coast of Turkey. However, the Prosobranch gastropod Tornus subcarinatus (Montagu, 1803) is recorded for the first time from the central Black Sea of Turkey. Previous records of the species were confined to the southern part of the Turkey, it is occurrence at Turkish coast of the Black Sea extends its distribution range to the Black Sea continued to Turkish coastal waters of Black Sea. [Keywords: Tornus subcarinatus; New record; Gastropoda; Mollusca; Black sea] Introduction  Benthic mollusk play important roles in the ecosystem structure and biodiversity maintenance1. Furthermore, some mollusk have been widely used in monitoring studies of various contaminants worldwide because of their economic and ecological importance2. Also, information on the spatial and temporal distribution of species is important for understanding biotic and abiotic interactions in marine soft sediments3,4. Marine molluscs considerably contribute in maintaining the ecosystem and more importantly some species can be directly utilized as indicators of environmental health or degradation5. Only about 20–25 % of the zoobenthos of the Mediterranean Sea is shared with the Black Sea, due to the less saline water which is unsuitable for most Atlantic and Mediterranean species, and due to the restriction of suitable habitats to the upper water layers because there are deep zones with anoxic conditions containing hydrogen sulphide6.  Investigations concerned with Prosobranchia species in the Black sea coasts of Turkey is quite scant and limited regarding depth and details except Russian and Romanian coasts of The Black Sea7,8,9. Among the coasts of Turkey, the lowest number of molluscan species was recorded from the Black Sea with 155 species belonging to Polyplacophora (2 species), Gastropoda (72 species) and Bivalvia (81 species). Also, the highest number of molluscan species was recorded from the Aegean Sea (825 species), followed by the Levantine Sea (807 species), and Sea of Marmara (537 species)10. Tornidae Family was reported 3 species [Circulus striatus (Philippi, 1836); Tornus mienisi van Aartsen, Carrozza & Menkhorst, 1998; Tornus subcarinatus (Montagu, 1803)] at Turkish coasts except for Black Sea coasts of Turkey by Ozturk et al.10. Of these species, Tornus subcarinatus (Montagu, 1803) is new record for the Turkish Black Sea coast.  Materials and Methods  Collection and evaluation of the study material The present study was performed with the aim to determine species of prosobranch mollusk distributed in the coastal ecosystem of Sinop peninsula and its shallow coast (Fig. 1). The benthic samples was collected at Hamsilos stations (42o03’05”N; 35o03’10”E) and Kale Yazısı stations (42o01’55” N; 35o 08’21” E) in depth from 0, 5 to 20 m between the years 2010-2011 by using a sampling equipment [Van Veen grab (0.1 m2)]. The grab was used at depth of  0-10-20 m on a fine sand and close to stones and INDIAN J. MAR. SCI., VOL. 48, NO. 10, OCTOBER 2019   1504 rocks surrounded by sand. Then, the collected material was fixed in 4 % formalin solution and examined in the laboratory. Material was washed through a sieve with 0.5mm and 1 mm mesh sizes, with the help of pressurized water, and was then stored in 70 % alcohol. Also, specimens were classified into groups using a stereomicroscope (Olympus SZ61 model), and species were identified. The gastropods were identified based on their morphometric characters such as the shape, operculum, number of whorls, colour pattern of shell etc.5. Identification was performed according to shell characteristics and several reference sources, including a lot of study(11-16) were used. The methods10,16 and the Check List of European Marine Mollusca17 were followed for the systematic status of the species. The specimens were photographed and, will be deposited afterwards in the invertebrate collections of the Hydrobiology department laboratory, Faculty of Fisheries, Sinop University with catalogue code: SNU-FF/ CRS/2012-01x. Additionally, the physicochemical parameters of the sampling stations were measured in-situ seasonally from the surface to a depth of approx.  5-10m, using a YSI 556 MPS water quality meter probe (Table 1).  Results and Discussion Ecological and systematic assessment This species was reported for the first time by Ostroumoff18, Oberling19 and Demir20 for the Marmara Sea; by Van Aaartsen and Kinzelbach21 and Demir20 for Aegean Sea; by Buzzurro and Greppi22 and Demir20 for Levantine Sea; by Pallary23 for Dardanelles (Ozturk et. al.24). But, up to date, there was no record on the species from Boshporus and the Black Sea coasts of Turkey (Ozturk and Cevik25; Ozturk et. al.10). Nevertheless, Ozturk et. al.10,   Fig. 1 — Map of the study area with the location of sampling stations  CULHA & SEZGIN: NEW RECORD FOR MOLLUSCA BIODIVERSITY OF TURKEY   1505 compiling the updated list on the identification atlas of the marine mollusc species of Turkey, have reported that Tornidae Family composed 2 genus and 3 species at Turkish seas except for Black Sea coast of Turkey. In this study, eight individuals of Tornus subcarinatus were found in soft substratum material sampled at the off shore of Sinop Peninsula (Central Black Sea coast of Turkey) by using a Van Veen grab (0.1 m2) (Fig. 2).  Systematic situation according to Gofas26; Tornus subcarinatus (Montagu, 1803)   Material examined: 5 specimens at Hamsilos station; 3 specimens at Kale Yazısı station, Sinop Peninsula, Black Sea Synonymised names;  Cyclostrema mirandum Bartsch, 1918 (dubious synonym) Delphinula pusilla Calcara, 1839 (synonym) Helix subcarinata Montagu, 1803 (original combination) Turbo rugosus Brown, 1818 (synonym) Kingdom : Animalia Phylum : Mollusca Classis: Gastropoda Subclassis: Caenogastropoda Order: Littorinimorpha Superfamily: Truncatelloidea Family: Tornidae Genus: Tornus Species: Tornus subcarinatus (Montagu,  1803)   Also,(27-29) reported that this Tornidae species was found under boulders in well oxygenated sand at depths between 0, 5 and 3 m. Likewise, this species  (T. subcarinatus) was found on the soft bottoms (sand, mud, sandy mud, muddy sand, silt) with algae (Jania rubens, Cystoseira spp., Padina pavonica, Dictyota dicotoma, Ulva sp., Stypopodium schimferi) at depths between 0,5 and 10 m in Iskenderun bay at Turkish coasts of Eastern Mediterranean30. According to de Kluijver et al.28, the general distribution of the species is along from Mediterranean to southern North Sea, where it is uncommon. The present recording is extending the distribution range of this species, Tornus subcarinatus (Montagu, 1803), to the Turkish coasts of central Black Sea (Fig. 3). Also, the species was checked for the present valid nomenclature according to the Clemam17 and WoRMS26 database.  Table 1 — Physicochemical parameters of the stations  Hamsilos station  (42o03’05”N; 35o03’10”E)  Kale Yazısı station (42o01’55” N; 35o08’21”E) Variables Abbrevia. Units Analytical method Mean±SD Min-Max Mean±SD Min-Max Temperature Temp. °C YSI 556 MPS / SET handheld meter 15.67 ± 7,27 7.12 23.71 14.36 ± 6.56 7.62 22.53 Salinity Saline ‰ (ppt) YSI 556 MPS / SET handheld meter 17.32 ± 0.79 15.21 18.14 17.55± 0.80 16.79 18.37 pH pH µS cm-1 YSI 556 MPS / SET handheld meter 7.56 ± 1.03 6.10 8.47 8.11± 0.74 7.13 8.89 Dissolved Oxygen DO mg l-1 YSI 556 MPS / SET handheld meter 6.37 ± 0.63 5.58 7.05 6.09 ± 0.52 5.40 6.69 Conductivity EC µS cm-1 YSI 556 MPS / SET handheld meter 23.52 ± 0.71 22.72 24.50 24.54± 1.05 23.16 25.60    Fig. 2 — General view of Tornus subcarinatus, a: ventral b: dorsal, found in Sinop peninsula, Scale: 500 µm (photo by Culha)  INDIAN J. MAR. SCI., VOL. 48, NO. 10, OCTOBER 2019   1506 Conclusion Tornidae Family was reported 3 species [Circulus striatus (Philippi, 1836); Tornus mienisi van Aartsen, Carrozza & Menkhorst, 1998; Tornus subcarinatus (Montagu, 1803)] at Turkish coasts except for Black Sea coasts of Turkey10. The Prosobranch gastropod Tornus subcarinatus (Montagu, 1803) is recorded for the first time from the Central Black Sea of Turkey. As a consequence, a lot of study on ecology and taxonomy must be conducted in mediolittoral zone of the Black Sea coasts of Turkey. Also, the further advance of this species to the coasts of Eastern Black Sea must be monitored and reported.   References  1 Zenetos, A., Classification and Interpretation of the Established Mediterranean Biocoenoses Based Solely on Bivalve Molluscs. J. Mar. Biol. Assoc. U.K. 76: (1996),  403-416.  2 Mutlu, E. & Ergev, M. B. Distribution of Soft-Bottom Mollusk (Mollusca) in Mersin Bay (Eastern Mediterranean Sea). Turk J Zool, 36 (4): (2012), 430-446.  3 Dauvin, J. C., Gomez Gesteira, J. L., Gentil, F., Ghertsos, K., Ropert, M., Sylvand B. & Thiébaut E., Spatial Structure of a Subtidal Macrobenthic Community in the Bay of Veys (Western Bay of Seine, English Channel). 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(Grima Publishing, Marsa, Malta), 1991, pp. 112. 13 Cachia, C., Mifsud, C. & Sammut, P.,The Marine Mollusca of the Maltese Islands. part 3, sub-class Prosobranchia to sub-class Pulmonata order Basommatophora, (Backhuys Publishers, Leiden, Netherlands), 2001, pp. 266. 14 Graham, A., British Prosobranch and Other Operculate Gastropod Molluscs. (Academic Press), 1971, pp. 112. 15 Barash, A. & Danin, Z., Fauna Palestina, Mollusca I, Annotated list of Mediterranean Molluscs of Israel and Snai. (The Israel Academy of Sciences and Humanities, Jerusalem), 1992,  pp. 405.  16 Sabelli, B., Giannuzzi-Savelli, R., & Bedulli, D., Cataloga Annotato dei Molluschi Marini del Mediterraneo. vol 2., (Libreria Naturalistica Bolognese, Bologna), 1992, pp.150.   Fig. 3 — The distribution of Tornus subcarinatus (Montagu, 1803) along the Turkish coasts the present study (circle); - previous records (Ozturk et. al.10)  CULHA & SEZGIN: NEW RECORD FOR MOLLUSCA BIODIVERSITY OF TURKEY   1507 17 Clemam, Check List of European Marine Mollusca, http://www.somali.asso.fr/clemam/index.clemam.html, (2017). 18 Ostroumoff A., Otchet o dragirovkah i planktonniyh ulovaht ekspeditsia “Selyanika”. Bulletin de l’Academie Imperiale des Sciences de St. Petersbourg 5: (1896), 33-92 (in Russian) 19 Oberling, J.J., Une collection de microgastéropodes marins d’Attique. De L’annuaire du musée d’histoire natürelle de la ville de Berne, (1960–1962), 207-221 (in French) 20 Demir, M., Shells of Mollusca collected from the seas of Turkey. Turk J Zool 27: (2003),101-140. 21 Aartsen, J.J. van, Kinzelbach R., Marine molluscs from the Iztuzu beach near Dalyan (Mediterranean coast of Turkey). 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Hayward & J.S. Ryland). Clarendon Press, Oxford: 1990, pp. 628-730 28 de Kluijver, M.J., Ingalsuo, S.S. & de Bruyne, R.H. Macrobenthos of the North Sea: 1. Keys to Mollusca and Brachiopoda. (World Biodiversity Database Series). Expert Center for Taxonomic Identification (ETI): Amsterdam, the Netherlands, (2000). 29 Poppe, G.T. & Goto, Y., European Seashells. (Wiesbaden/Verlag Christa Hemmen, Vol. I.), 1991, pp. 352. 30 Bitlis-Bakır, B., Ozturk, B., Doğan, A. & Onen, M., Mollusc fauna of Iskenderun Bay with a checklist of the region. Turk J Fish Aquat Sc, 12: (2012), 171-184.  

New record for the mollusca fauna of the black sea coast (sinop peninsula) of turkey: white belted shell, Tornus subcarinatus (Montagu, 1803), (Gastropoda, Tornidae)

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New record for the mollusca fauna of the black sea coast (sinop peninsula) of turkey: white belted shell, Tornus subcarinatus (Montagu, 1803), (Gastropoda, Tornidae)

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